1005503 has 2 divisors, whose sum is σ = 1005504. Its totient is φ = 1005502.

The previous prime is 1005493. The next prime is 1005527. The reversal of 1005503 is 3055001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1005503 - 2⁶ = 1005439 is a prime.

It is a super-2 number, since 2×1005503² = 2022072566018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502751 + 502752.

It is an arithmetic number, because the mean of its divisors is an integer number (502752).

2^1005503 is an apocalyptic number.

1005503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005503 is an equidigital number, since it uses as much as digits as its factorization.

1005503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 1005503 is about 1002.7477250037. The cubic root of 1005503 is about 100.1830978804.

It can be divided in two parts, 1005 and 503, that multiplied together give a triangular number (505515 = T₁₀₀₅).

The spelling of 1005503 in words is "one million, five thousand, five hundred three".